Help with ABS/DSC/AWD warnings

[mart_dev]

I had those same faults (specifically handbrake and "ECU NOT PRESENT") When my ATC CONTROL UNIT took a swim due to leaky rubber glands in the boot lid (trunk lid). The fault was intermittent until the unit finally bombed. I was fortunate enough to have had a mechanic allow me access to his parts bin and to shorten a long story, swapping out the unit solved my problem... No need to have it coded to my vehicle either which was a relief. Not saying that's your issue here but perhaps you could add it to your check list. It's located in the boot right next to the battery.

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[mikey777]

PHL08,

Were you able to resolve your issues?
I'm having the exact same fault codes. I'm going to have them replace the transfer case fluid and readapt to see if it resolve this. When was the last time you replace the transfer case fluid?

[ard]

Originally Posted by mikey777

. I'm going to have them replace the transfer case fluid and readapt to see if it resolve this.

under what theory does the fluid cause these symptoms???

[mikey777]

Originally Posted by ard

under what theory does the fluid cause these symptoms???

Fault codes 0055C3 and 0055C6 looks to be from the transfer case (according to my mechanic) and since I haven't changed it once and I have 145K miles, thought that might help. Kinda makes sense because transfer case has to do with all wheel drive 4x4 mechanics. Maybe completely off base. We'll see.

[ard]

Originally Posted by mikey777

Fault codes 0055C3 and 0055C6 looks to be from the transfer case (according to my mechanic) and since I haven't changed it once and I have 145K miles, thought that might help. Kinda makes sense because transfer case has to do with all wheel drive 4x4 mechanics. Maybe completely off base. We'll see.

You said "exact same"...phl has had a dozen different and varying codes...hence the confusioon. Or are you getting all the same codes as him?

Fluid changes are always a good thing. Fluid changes to chase hard faults after 145k of nothing might not be productive...but as they say, it wont hurt.

[gregg3gs]

Guys, are you certain you are dealing with a working X5?

I'm almost certain you are looking at this issue the wrong way.

Please check out my previous post:
Pay an independent bmw mechanic to troubleshoot this if you dont have the skills.

http://www.xoutpost.com/bmw-sav-foru...lfunction.html

Good luck.

[PHL08]

My problem is resolved with an $80 steering sensor cable (P/N 34526771776).

The general progression of events:
Repairs to front left wheel assembly several months back for issues with carrier and hub.
Shortly after repairs, ABS/DSC/AWD warnings appeared randomly

After initial research in these forums, it was suggested could be weak battery. Considering mine was original from the July 2008 manufacture date, I went ahead and got a Duralast from Autozone. That ounce of prevention was likely prudent now that it's getting cold again in my area.

Indicators came back on, but turned out battery wasn't fully charged. Took it back to AutoZone and they juiced it up.

Indicators came back on. Took it on a few long rides to insure battery was given a fair break in/charge up, but indicators went off for a time and then came back.

Checked code reader and found 'steering angle sensor' fault and learned that I had to do the full left-right steering wheel movement to calibrate the steering sensor after battery replacement and registration with the car.

Indicators came back, intermittently. Sometimes after days of nothing. Sometimes immediately. I had thought maybe it was related to leaving the car inactive for a few days at a time.

Then a new fault came on showing a problem with the speed sensor and I read some other forum posts about it. As it turns out, that part was replaced as part of my front left wheel assembly work I mentioned at the start of this post. I also provided the parts to the mechanic, including a non-OEM speed sensor for $25 instead of an OEM which some dealers were selling on eBay for $80+ (new). My local dealer wanted $150!

So now with this new fault, I decided to just buy a new OEM sensor from Cleveland BMW on eBay. The replacement was the easiest work I've ever done on the car. The non-OEM sensor that I removed (which was only 2 months old) may not have been firmly plugged into the feed cable in the mini junction box in the wheel well. It seemed to come unplugged too easily, and I had to really firmly plug the new one into the socket to get it to snap into the connector.

In the past weeks, when I would start the car the indicators would be off. All I would have to do is turn the wheel to the left to almost full rotation and they would come on without fail. Or if I started to drive and make a left turn they would often come on.

So...it was possibly a bad non-OEM sensor or it was possibly that it was simply not plugged in firmly enough. I'm not going to take the wheel off and try it again. All works now and I'm happy to be done with this plaguing problem.

[ard]

Originally Posted by PHL08

All works now and I'm happy to be done with this plaguing problem.

Well, lets hope.

[gregg3gs]

Originally Posted by PHL08

My problem is resolved with an $80 steering sensor cable (P/N 34526771776).

The general progression of events:
Repairs to front left wheel assembly several months back for issues with carrier and hub.
Shortly after repairs, ABS/DSC/AWD warnings appeared randomly

After initial research in these forums, it was suggested could be weak battery. Considering mine was original from the July 2008 manufacture date, I went ahead and got a Duralast from Autozone. That ounce of prevention was likely prudent now that it's getting cold again in my area.

Indicators came back on, but turned out battery wasn't fully charged. Took it back to AutoZone and they juiced it up.

Indicators came back on. Took it on a few long rides to insure battery was given a fair break in/charge up, but indicators went off for a time and then came back.

Checked code reader and found 'steering angle sensor' fault and learned that I had to do the full left-right steering wheel movement to calibrate the steering sensor after battery replacement and registration with the car.

Indicators came back, intermittently. Sometimes after days of nothing. Sometimes immediately. I had thought maybe it was related to leaving the car inactive for a few days at a time.

Then a new fault came on showing a problem with the speed sensor and I read some other forum posts about it. As it turns out, that part was replaced as part of my front left wheel assembly work I mentioned at the start of this post. I also provided the parts to the mechanic, including a non-OEM speed sensor for $25 instead of an OEM which some dealers were selling on eBay for $80+ (new). My local dealer wanted $150!

So now with this new fault, I decided to just buy a new OEM sensor from Cleveland BMW on eBay. The replacement was the easiest work I've ever done on the car. The non-OEM sensor that I removed (which was only 2 months old) may not have been firmly plugged into the feed cable in the mini junction box in the wheel well. It seemed to come unplugged too easily, and I had to really firmly plug the new one into the socket to get it to snap into the connector.

In the past weeks, when I would start the car the indicators would be off. All I would have to do is turn the wheel to the left to almost full rotation and they would come on without fail. Or if I started to drive and make a left turn they would often come on.

So...it was possibly a bad non-OEM sensor or it was possibly that it was simply not plugged in firmly enough. I'm not going to take the wheel off and try it again. All works now and I'm happy to be done with this plaguing problem.

Good to see you've solved it.
Thanks for update.

[RADRACR]

Originally Posted by mart_dev

I had those same faults (specifically handbrake and "ECU NOT PRESENT") When my ATC CONTROL UNIT took a swim due to leaky rubber glands in the boot lid (trunk lid). The fault was intermittent until the unit finally bombed. I was fortunate enough to have had a mechanic allow me access to his parts bin and to shorten a long story, swapping out the unit solved my problem... No need to have it coded to my vehicle either which was a relief. Not saying that's your issue here but perhaps you could add it to your check list. It's located in the boot right next to the battery.

This caught my attention. I had the same water problem. Big damage due to cracked rubber. EXPENSIVE fix for parts and labor. They replaced the module that controls the trunk lid but didn't replace this module you mention. Also expensive But seems the most plausible right now.